package com.duofan.gmall.cart.vo;

import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.util.List;

/**
 * 购物车
 * 需要计算的属性重写get方法,每次获取属性都重新计算
 */
public class Cart {

    List<CartItem> items;
    /** 商品数量 */
    private Integer countNum;
    /** 商品类型数量 */
    private Integer countType;
    /** 商品总价 */
    private BigDecimal amount;
    /** 减免价格 */
    private BigDecimal reduce = new BigDecimal("0");

    public List<CartItem> getItems() {
        return items;
    }

    public void setItems(List<CartItem> items) {
        this.items = items;
    }

    public Integer getCountNum() {
        int count = 0;
        if(!CollectionUtils.isEmpty(items)) {
            for (CartItem item : items) {
                count += item.getCount();
            }
        }
        return count;
    }


    public Integer getCountType() {
        int count = 0;
        if(!CollectionUtils.isEmpty(items)) {
            for (CartItem item : items) {
                count += 1;
            }
        }
        return count;
    }

    public BigDecimal getAmount() {
        BigDecimal amount = new BigDecimal("0");
        // 1.计算购物项总价
        if(!CollectionUtils.isEmpty(items)) {
            for (CartItem item : items) {
                if(item.getCheck()) {
                    amount = amount.add(item.getTotalPrice());
                }
            }
        }
        // 2.减优惠总价
        amount = amount.subtract(getReduce());
        return amount;
    }

    public BigDecimal getReduce() {
        return reduce;
    }

    public void setReduce(BigDecimal reduce) {
        this.reduce = reduce;
    }

}
